sportscaster bob costas taking a stand on sunday night football. >> if jovan belcher didn't possess a gun, he and kasandra perkins would both be alive today. >> reporter: today chiefs head coach, romeo crennel, who witnessed belcher's suicide, added his voice. >> all i know is a player with a gun and i know it's not a good thing. >> reporter: but what drove belcher to kill? was it a head injury, so common in football, or was this another tragic instance of domestic violence, which kills two to three women in this country every single day? john schriffen, abc news, kansas city. >>> and still ahead on "world news," a surprising experiment. is it possible you are sleeping behind the wheel with your eyes wide open? be sure to watch next. sometimes life can be well, a little uncomfortable. but when it's hard or hurts to go to the bathroom, there's dulcolax stool softener. dulcolax stool softener doesn't make you go, it just makes it easier to go. dulcolax stool softener. make yourself comfortable. you spend all day cooking it. so why spend even a moment considering any broth but swanson? t